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Addition of nitrate to paper mill wastes

page 163

Addition of Nitrate to Paper
Mill Wastes
Harold C. Koch, Technical Director
Joseph J. Lugar, Asst. Technical Director
Auglaize Division
Weston Paper and Manufacturing Co.
St. Marys, Ohio
The Auglaize Division Mill of The Weston Paper and Manufacturing Co. located in St. Marys, Ohio, has had problems arise from the
discharge of mill waste waters into a small stream that flows through
the city. Complaints about odors from the stream during the warm,
dry months of the summer necessitated that attention be given to the
problem.
SOURCE AND NATURE OF WASTES
The mill produces on two cylinder-type paper machines grades of
paperboards intended for containers of various kinds. It may be classified as a linerboard mill, because the principal product is the paperboard
used as the inner and outer facings in the manufacture of corrugated
board for containers. Other grades also made, though in smaller quantities, are paperboards for solid fibre boards, boxboards for single wall
boxes and papers for winding into paper tubes and paper cans. A portion
of the fibrous raw materials used are classified as secondary stocks, that
is, the fibers have been previously used in making other paper products
such as corrugated boxes. The remainder of the fibrous materials is
made up of previously prepared wood pulps. Stocks are not cooked or
washed, and paper machines provide the principal sources of the waste
waters.
The mill waste water suspended solids are principally made up of
paper fibers most of which are short. With these are some noncombus-
tible fines quite varied in nature and source. The suspended solids in
the waste waters run about 240 parts per million or 2 pounds per
thousand gallons. With these solids are some starches, cellulose degradation products, rosin, possibly some lignin as well as some inorganic
chemicals such as aluminum sulphate, basic silicates, and water hardness
chemicals. These waters run from 200 to 400 ppm in BOD, and have a
pH from 7 to 8. A temperatuere of about 90° F appears to be a fair
average for the total mill waste waters.

Addition of Nitrate to Paper
Mill Wastes
Harold C. Koch, Technical Director
Joseph J. Lugar, Asst. Technical Director
Auglaize Division
Weston Paper and Manufacturing Co.
St. Marys, Ohio
The Auglaize Division Mill of The Weston Paper and Manufacturing Co. located in St. Marys, Ohio, has had problems arise from the
discharge of mill waste waters into a small stream that flows through
the city. Complaints about odors from the stream during the warm,
dry months of the summer necessitated that attention be given to the
problem.
SOURCE AND NATURE OF WASTES
The mill produces on two cylinder-type paper machines grades of
paperboards intended for containers of various kinds. It may be classified as a linerboard mill, because the principal product is the paperboard
used as the inner and outer facings in the manufacture of corrugated
board for containers. Other grades also made, though in smaller quantities, are paperboards for solid fibre boards, boxboards for single wall
boxes and papers for winding into paper tubes and paper cans. A portion
of the fibrous raw materials used are classified as secondary stocks, that
is, the fibers have been previously used in making other paper products
such as corrugated boxes. The remainder of the fibrous materials is
made up of previously prepared wood pulps. Stocks are not cooked or
washed, and paper machines provide the principal sources of the waste
waters.
The mill waste water suspended solids are principally made up of
paper fibers most of which are short. With these are some noncombus-
tible fines quite varied in nature and source. The suspended solids in
the waste waters run about 240 parts per million or 2 pounds per
thousand gallons. With these solids are some starches, cellulose degradation products, rosin, possibly some lignin as well as some inorganic
chemicals such as aluminum sulphate, basic silicates, and water hardness
chemicals. These waters run from 200 to 400 ppm in BOD, and have a
pH from 7 to 8. A temperatuere of about 90° F appears to be a fair
average for the total mill waste waters.